QUESTION:
Do you have an example demonstrating confinement/compression of an o-ring using ogden hyperelasticity and contact?
ANSWER:
I found some old files in which I use curve fitting to obtain 3 parameter Ogden hyperelastic coefficients. I incorporated this material data in a simple 2D axisymmetric o-ring model including contact that I found in the release 5.5 structural nonlinearities training notes.
The model uses pure displacement formulation, NOT mixed u-P. I could not get it to converge with mixed u-P.
I am not clear on just what the implications of this are, although the documentation asserts that mixed u-P is more robust for nearly incompressible problems.
QUESTION: Do you have an example demonstrating confinement/compression of an o-ring using ogden hyperelasticity and contact? ANSWER: I found some old files in which I use curve fitting to obtain 3 parameter Ogden hyperelastic coefficients. I incorporated this material data in a simple 2D axisymmetric o-ring model including contact that I found in the release 5.5 structural nonlinearities training notes. The model uses pure displacement formulation, NOT mixed u-P. I could not get it to converge with mixed u-P. I am not clear on just what the implications of this are, although the documentation asserts that mixed u-P is more robust for nearly incompressible problems. |
||
|